Patents by Inventor Ithussei Chiba

Ithussei Chiba has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Plane light source unit
    Patent number: 5126882
    Abstract: A plane light source unit is provided which comprises a first element having a light incident face at least at one side end thereof and a first light emitting surface extending perpendicularly to the light incident face, the first element further having a reflecting layer provided on a surface thereof opposite to the first light emitting surface, and a second element having a light incident surface which receives the light emitted by the first element and a second light emitting surface through which light is emitted in a predetermined direction, the first light emitting surface and/or the opposite surface of the first element having a directive function to cause incident light through the light incident face to emit through the first light emitting surface in a direction oblique to the direction of the light, the second element having a large number of prism units formed on the light incident surface thereof.
    Type: Grant
    Filed: November 10, 1988
    Date of Patent: June 30, 1992
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Makoto Oe, Ithussei Chiba
  • Plane light source unit
    Patent number: RE38243
    Abstract: A plane light source unit is provided which comprises a first element having a light incident face at least at one side end thereof and a first light emitting surface extending perpendicularly to the light incident face, the first element further having a reflecting layer provided on a surface thereof opposite to the first light emitting surface, and a second element having a light incident surface which receives the light emitted by the first element and a second light emitting surface through which light is emitted in a predetermined direction, the first light emitting surface and/or the opposite surface of the first element having a directive function to cause incident light through the light incident face to emit through the first light emitting surface in a direction oblique to the direction of the light, the second element having a large number of prism units formed on the light incident surface thereof.
    Type: Grant
    Filed: July 2, 1997
    Date of Patent: September 2, 2003
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Makoto Oe, Ithussei Chiba
  • Plane light source unit
    Patent number: RE35704
    Abstract: A plane light source unit is provided which comprises a first element having a light incident face at least at one side end thereof and a first light emitting surface extending perpendicularly to the light incident face, the first element further having a reflecting layer provided on a surface thereof opposite to the first light emitting surface, and a second element having a light incident surface which receives the light emitting by the first element and a second light emitting surface through which light is emitted in a predetermined direction, the first light emitting surface and/or the opposite surface of the first element having a directive function to cause incident light through the light incident face to emit through the first light emitting surface in a direction oblique to the direction of the light, the second element having a large number of prism units formed on the light incident surface thereof.
    Type: Grant
    Filed: June 29, 1994
    Date of Patent: December 30, 1997
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Ithussei Chiba, Makoto Oe